Light
Light travels in straight lines as a WAVE. It is a form of radiation (know as visible light). Visible light is transferred through space at a speed of 300,000 km/s. Light has a wavelength of 1/2000 or 0.005mm. Some objects produce own light e.g. light bulb, sun, fire. Some objects reflect light e.g. Moon, most objects we see. Some objects bend (refract) light. Some objects absorb light,
Invisible Light
Invisible light is made up of several colour wavelengths (as seen in a rainbow). The colour Violet has the shortest wavelength and the colour red has the longest wavelength.